As you pointed out, the other Halos had an easy mode. Your argument seems tangential to the author's. You just think they made hard mode too easy (perhaps another level of difficulty would have been in order, since they presumably shifted all the difficulties down because of market research).
Go you guys!
My company uses Balsamiq for mockups, and I was impressed enough that I started using it for personal projects too.
I'm happy to see you do well.
I've been using a Macbook with a SSD for about a year (mainly for coding in Eclipse), and it's noticeably snappier than my desktop machine with a magnetic drive.
It was definitely worth the cost for the productivity boost.